Nightmare
"Marge, anyone could miss Canada! All tucked away down there."
Joined: Feb 2016
Posts: 9,636
Likes: 1,283
From: Barrie, ON Canada
Rep Power: 222 
Re: Nightmare
I had that code appear on my old car and I managed to clean my cat with some "snake oil" cat cleaning stuff I put in my gas tank.
Drove the car 40,000 kms before I wrote it off and the light never came back.
Might be worth trying a $20 bottle of goop before spending a few hundred on a cat.
Drove the car 40,000 kms before I wrote it off and the light never came back.
Might be worth trying a $20 bottle of goop before spending a few hundred on a cat.
Joined: Aug 2003
Posts: 21,620
Likes: 1,252
From: Las Vegas, NV
Rep Power: 511 Re: Nightmare
For clarification purposes of the thread, OP has a 98 lx (after searching OP's post history).
That said, the cat is integrated into the exhaust mani. OP, do a visual on the cat, make sure it's not cracked. Those seem to be a bit more prone to cracking, causing the 420 code to appear.
That said, the cat is integrated into the exhaust mani. OP, do a visual on the cat, make sure it's not cracked. Those seem to be a bit more prone to cracking, causing the 420 code to appear.
If you think a good mechanic is expensive, try hiring a bad one
Joined: Dec 2011
Posts: 32,017
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From: Midwest. Aiming about mid-chest
Rep Power: 518 
Thread Starter
Registered!!
Joined: Dec 2016
Posts: 17
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Rep Power: 0 
Re: Nightmare
😅 y''all are too much lol. I ended up checking it out, turns out the cat was all burnt. No flitter left to clean the air output. That would makes sense since I upgrade the headers. Anyways the part cost me about $150 max. got a buddy to welded it on for me. Hopefully this one doesn't burnt out anytime soon.
